This was surprisingly easy to find out on Google, but I learned the term for one of my favorite fantasy writing conventions just now: the postpositive adjective!
it's how you get awesome grammatical constructions like 'the cloak fuligin' to describe Severian's black cloak in Book of the New Sun. It's describing the cloak literally, but by reversing the positions of the adjective and noun, it gives it a sense of grandiosity as an important symbol of the order of seekers for truth and penitence.